The velocity of water near a river's surface is 20 km/hr. If the depth of the river is 4 m, calculate the shearing stress between the horizontal layers of water. Take, coefficient of viscosity of water = 0.01 poise.

Explanation

To calculate the shearing stress between the horizontal layers of water in the river, we can follow these steps:

### Step 1: Convert the velocity from km/hr to m/s
The velocity of water near the river's surface is given as 20 km/hr. We need to convert this to meters per second (m/s).

\[ \text{Velocity (V)} = 20 \text{ km/hr} = \frac{20 \times 1000 \text{ m}}{3600 \text{ s}} = \frac{20000}{3600} \approx 5.56 \text{ m/s} \]
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